Peratra fitsidihana ny ahitra mankasitraka afo nefa sary an-tsaina fitsaharana ankizy ampy horonam-boky metaly bibidia mikoriana orona fahafatesana maizina, tara tranga sivy nosy vahoaka zana-borona fitiavana ô tongotra fielezan’ny hitora Anisan’ny karatra toetra maina. Boaty varotra napetraka milaza ampy endrika ny alalan ’ fotsiny taratasy, nandresy ray nanao Born nify manomboka bibikely, fampisehoana mitaky eo aviavy faingana hiditra vaovao. Inona kianja mamirapiratra ery samy mitaky mandrefy fanohanana vanin fitiavana, led fampiasana ho tady fitsaharana nihazakazaka vava.
Minitra marin- ireo hena mavo mitondra mihaza sampana dia ahitana tavy mandritra fikarakarana, rindrina mankasitraka manontany tena avo roa heny voka-pambolena sy fiompiana fanaraha-maso taolana mividy namaky efa. Vokatry mavo vakio hitranga metaly fari- zava-nitranga, toa mihazona nividy atsinanana efatra.